Rosario Umberto Balsamo (born 10 March 1942) is an Italian singer-songwriter and composer, best known for the songs "L'angelo azzurro" and "Balla". Background Born in Catania, Balsamo was the you
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b3aa68b571ee6201911c1d0793d373002f378ced33f675f38adeb13417735. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ff6c870-7ea1-4ff1-9d3a-5252a98c5c3d.json and https://artists.proofprofile.net/proofs/artist/6ff6c870-7ea1-4ff1-9d3a-5252a98c5c3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4e27660ffcee4591213e0eaa4388f4914a9d025a46a58fd8d717427f6ec600. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD018201803.
Umberto Balsamo: Balla / L'Angelo Azzurro (New Recording)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0907c71d5b3e1f4a2244c9a20dedb43d9f8c85cb2c0ad48e5bb917296ab39c9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB409500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26404c97ba6b77dda4e01c6b56c8dc8556b4e557fc5c92adf16de5896ab7634. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB409500018.
L'Angelo Azzurro (New Disco Mix Vocal Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3ace415bff0cf64f6c082ec3134c58eaca9f7d2aef223af0107d66c1b50da1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITB409500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9318689f29da58704c21f3f5ce50d63f72c278cb5e12f03c37967d846f785dcb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYE0102039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7f4f9b7ef3d1a0957ba930886b233118c57b709195e3c22be1a84bc0f5795. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009601801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd30feb1d323e7e8b07fcc7d0948b24d179f7b8f46be5e1ae894e0b1144766bd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR001100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b84191e00c24f2069a67f54de0c19b8787d9fccf41c19ec670ff7a6a57c49. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ008700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78edb3ce61ea69ac65ac7960a90c1cba3f3aa095d4fcff76cfcbb2a05fa8535e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD018103808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3a1990eed337f656cf502e0afc6a4fc9c074e71ddf5cdcb8756828e891b9ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009700151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387d0629fa94ce95b120c2bf6f504c86eb65ee8cd076b01706956837e2dc6761. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR008000851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb491b071278b595f57e3626d3c5473d90024f2bbdd61b59dde5bcea9c0025db2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR007800691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f54185e650a703e64aaa49ae68c124130d66bc9e9f5937eaae407b0e8db2cc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009300814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b636edf89d33dd878b0b19d4c1eba8480f53d86450be38229a5678397e691. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009601791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475b65c5163a57f9d9e98aeb4f30f291b131975c270cf7a430654eb38a503f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR008200851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd005daad9b4de904c576b7d808018889023b9689ece04038bb325aed66e4e25d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR008800391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e07191d2e5b795c71074d6af21a3376754fb2061c660188f60f0fd6ac21233. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR000700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0f6603c5a4d7fec4a7aea5688022bb9d19bf3fdb5faebea0f87a696ea7d5df. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD017302003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb60d19de8bd9981ca1b8cd15825994c31b215a58106e901147536f49ff595b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ008600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2c0745c354a2cf5435736671c097728674a3fdac57d58484505c1e454fdaea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5151700842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36ac43ff83ef71c4fa3df2fd4d0779cab2a57cd5ba349a3a8422d52743fe261. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR006700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e21aabccf72ece1daaa783e12328bbdd714d3bda11c441382bdb2d794a81f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR007500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75029465cc77102129b2f08728771a2c8653871f718aff540f84f52575fae51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ007500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391c2215eabbe41059ccaed3a400e9c7dc8eec4436bf99fd905d4230fb3dde70. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR006400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994856cf87bf26bf95b914117c07411f9094e1a2a6d43cc7d9b7c4d2ce96dfed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYE0102139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b84191e00c24f2069a67f54de0c19b8787d9fccf41c19ec670ff7a6a57c49. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ008700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b636edf89d33dd878b0b19d4c1eba8480f53d86450be38229a5678397e691. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009601791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78edb3ce61ea69ac65ac7960a90c1cba3f3aa095d4fcff76cfcbb2a05fa8535e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITD018103808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dad98c7761426e597834fa3e7dccde36f22a63e36c070fbea00f83d0256a627. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc6bfc0fa819530d5adb462cce4abf53aa878e8a4bfe00a83518902aa19d4b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRE11100808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d70482f78eca879f8357c5e682be93a85f5570039fbe2d91060565d9a0e57f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAHS9803698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c31d772368bfee9b4e23188acb34eeaa7e4808f00868163c2e768ccdd0d4b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYE0102032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24f14a2c0c37c541fe15786eeecfd46d5625c992705fe927c3a66059ad5e105. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dad98c7761426e597834fa3e7dccde36f22a63e36c070fbea00f83d0256a627. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc538bcc4e72046cf41863700ae686170478526768dfa2cda441ae6265a58b557. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRE19600208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38548bedcf8c75270c9ba7e88f3721c95f49228cfc3540084c0eee04c0782972. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYE0101725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2492bc6b9518ae2868061db1b61d9893d9f0cd84c40ce758754b5e53fa89db5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITR009800311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3bdd0b65194abd45965aad9d3eaec42a7c8903c39ae9b2d1749bbe903bb837. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITQ001200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1947117efcc3c3d22a665629960f728d465edb8061843f7991176ea801e47592. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLRD52349480.